Rebirth of the Auto Giant

Chapter 42 Personal Teaching

As usual, Wang Shi took Zhou Delin and the other five people down to the engine room at the bottom of the cabin.

How could anyone let Wang Shi do the work of moving parts? Everyone was rushing to move it.

Since you want to learn other people's techniques, you should act like you're begging for help.

Wang Shi also knew everyone's intentions and didn't point them out. How much he could learn was a matter of personal ability.

The 12 pistons, piston rings, and piston connecting rod bushings are all new.

After installing the piston pins, install the piston rings.

"Let's install this piston ring into the piston first." Wang Shi picked up one of the neatly arranged pistons on the ground. Zhou Delin and the others asked Zhou Delin to clean these things with diesel to remove the metal powder on them.

"There are three piston rings, namely the two top gas rings and the bottom oil ring. Their function is just like the literal meaning. The function of the gas ring is to withstand the compression ignition explosion of the gas mixture on the top of the piston.

The impact generated when the cylinder moves downward causes the piston to move downward, pushing the connecting rod and the crankshaft below to rotate. As for the oil ring, as the name suggests, its main function is to scrape off the oil sprayed in the cylinder liner." Wang Shi

While installing, the function of the piston ring was introduced.

"Do you understand?" Wang Shi finished speaking and looked at Zhou Delin.

The reason why Wang Shi talked about such core technology in such detail was mainly for Zhou Delin. Zhou Delin can be regarded as his half-apprentice. Now that they met by chance, Wang Shi wanted to use this time to teach him the whole process of engine overhaul in more depth.

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As for them, Wang Shi is not cold, and it depends on their ability to listen as much as they can.

"I understand, master." Zhou Delin also knew Wang Shi's intention and nodded in response.

Now it is different from the past. Now that I have changed my career and am no longer a soldier, my master is still teaching me so carefully. I believe that after following the master to overhaul the engine, I will be more stable in the company in the future.

"When installing the piston rings, the order is from bottom to top. Install the oil ring below first. This oil ring is a component and has a spring inside. Let's install it now." Wang Shi said as he assembled the oil ring.

, and then slowly push it to both sides of the opening and install it into a groove at the bottom of the piston.

"The oil ring has been installed. Next, let's install the gas ring. The installation of this gas ring is very particular."

"When installing these two gas rings, remember not to make the opening too large. If you see the mark at this point, this side is facing up and can barely pass through the piston. If you are more professional, you should have a special tool for installing piston rings.

Yes, we don’t have it now, so we don’t need it, but we have to be careful, otherwise it will break easily.”

"Yes!" In addition to Zhou Delin, the other four people also nodded in unison.

Wang Shi asked someone to find a piece of leather, tear open two pieces, and apply force to both sides of the opening. The air ring slowly opened, and then was installed downwards in the groove in the middle. In this way, Wang Shi filled the two air rings.

After the installation was completed, he continued: "I just said that the installation of the two gas rings is very particular. The opening of the two gas rings cannot be facing the direction of the piston pin, and it is basically at an angle of forty degrees with the piston.

, the opening positions of the two air rings are staggered by 180 degrees." Wang Shi said in detail while rotating the opening positions of the two air rings.

"As for the bottom oil ring, it doesn't matter. As long as it rotates without getting stuck, it's fine."

"This is the key point of installing the entire piston ring."

Wang Shi installed a piston ring, then cleaned it again with diesel, then poured engine oil into the three grooves, and also poured engine oil into the piston pin and connecting rod to lubricate it.

"The advantage of this is that at the moment the engine starts, because they are newly installed parts, the oil from the oil pump in the oil pan has not had time to lubricate these parts. We now provide

It is doused with engine oil to avoid the wear and tear caused by the moment it is without engine oil."

"Thank you, master."

"Thank you, Master Wang." Others now know that Zhou Delin is Wang Shi's half-disciple, and like him, they have to add the word "王" in front of him to distinguish him.

"Next is the connecting rod tile. This one is also divided into left and right, and this opening is opposite to the opening..."

Wang Shi explained the new connecting rod tiles while installing them.

"One piston is done. Each of you can try the rest." Wang Shi said and asked everyone to assemble the remaining 11 by hand and stood aside to guide them.

Everyone was also very excited. They didn't expect that Wang Shi would let him do such a core part, and they were all very serious about it.

"Next, let's install the cylinder liner." After everyone had installed it, Wang Shi also checked it himself. After everything was fine, Wang Shi said. Zhou Delin heard Wang Shi's words and went over to get the cylinder liner, as well as two sealing rings.

"The installation of the cylinder liner is relatively simple. Install the two sealing rings on it, and then smear it with engine oil. The advantage of this is to prevent it from being cut when it is pressed into the body and causing water to enter the engine oil."

"The function of these two sealing rings is to seal water. The two tape sealing rings are filled with cooling water in the middle. If they are not installed properly, for example, if they are not coated with engine oil, they will be easily damaged without lubrication.

The sealing ring is easily cut by the engine body, causing the water inside to leak into the oil pan below, causing an increase in engine oil..."

This is a very technical job. Although it seems simple, if the installation is not good and the engine oil increases, it will be very troublesome. Moreover, if the ship is sailing at sea, it will be even more troublesome. Wang Shi personally came to do it in a balanced way.

The cylinder liner is pressed into the body.

"The cylinder liner is now installed."

"Master, drink some water and take a rest." Zhou Delin gave him a bowl of water and brought it over.

"Thank you." This is a marine engine. The pistons and cylinder liners are all big. I used to repair cars. How could I have repaired such a large marine engine? With so much work, Wang Shi felt a little tired, so he took the bowl and drank.

stand up.

"Hey, my Coke." It was stuffy inside the cabin and everyone was covered in sweat. Wang Shi would think of Coke now.

After resting for a while, I installed the piston.

"Attention, there are several key points when installing the piston. First, do you see this?" Wang Shi said, pointing to an arrow mark on the top of the piston.

The five of them all came together. Of course, everyone knew that Zhou Delin should stand at the front. They also all knew that they were lucky enough to hear such core techniques today. They were all taught by Master Wang to his apprentices, so they couldn't take them away.

c position.

"I saw it." Everyone responded in unison after coming over and seeing the arrow mark.

Wang Shi continued: "When installing the piston, the direction of the mark should be toward the front of the engine. Technically speaking, it is the side of the timing gear, which is the side of the fan blade."

After Wang Shi finished speaking, he asked another master to transfer the crankshaft and turn the crankshaft of this cylinder to the bottom dead center position.

"Zhou Delin, bring over the special piston installation tool." This is a special tool for installing the piston into the cylinder liner.

Wang Shi asked Zhao Yiming to buy this special tool from Shangchai Factory. It is made of iron sheet. You can use the four-corner tool to rotate it to reduce the diameter and reduce the size of the piston ring.

Paying attention to the direction of the mark, Wang Shi used a four-corner tool to rotate the gear. The iron plate slowly shrunk little by little until he could no longer twist it. Then he put it down and slowly pushed the piston inward with a wooden stick.

After they were all pushed in, Wang Shi came to the crankshaft observation hole on the right side of the body and asked a master to turn the crankshaft. When the connecting rod journal turned to the observation hole, he stopped, and then he picked up the connecting rod cover with the connecting rod shoe installed and looked at it.

I told Zhou Delin about the direction of the opening and installed it, and then installed the two connecting rod bolts.

The next step is to tighten the bolt three times in succession according to the torque.

…

"This is a complete piston installation process. It doesn't matter if you don't remember it. Just keep it in mind. What you will mainly do in the future is engine maintenance and engine overhaul. It is not your turn yet."

After installing one, Wang Shi stopped and summarized it with Zhou Delin.

"We often say that this car is powerful and that car is weak. It depends on the fit between the piston gas ring and the cylinder liner. If the engine water temperature is too high, or the oil used is not good, or the oil has not been changed for a long time,

Then the gas ring and the cylinder liner will wear out, the wear will increase, the tension of the gas ring will decrease, and the car will leak air. This is what we call engine powerlessness."

"So it is very important to maintain the engine on time, especially the first maintenance of the engine. During the running-in period, the engine wears out very quickly and there is a lot of metal powder. If the oil is not changed on time, these metal powders will damage the engine.

wear and tear.”

ps: This chapter is a very professional engine overhaul process, the content is a bit monotonous, please forgive me.